It just looks strange. Most women I know cannot do even one pull-up, yet she seems to easily hold herself up by her arms, and it doesn't look like a big release when she "lands". Another issue is that the Helis are pulling away from each other at a pretty decent angle. I don't know the calculations, but I do know that it raises the force required significantly.
Here are the calculations
https://www.facebook.com/HeliGraphi...1781027907066/611664732252024/?type=1&theater
So each heli is lifting 82lbs with 700mm 3D blades?? I remember when I put a 6 lb camera and gimbal on my 700mm heli, with stock tailblades it couldn't hold the tail. With 82 lbs I struggle to see how those things could hold the tail. It doesn't sound like they are struggling very much at all.
Let's see one heli lift 82 lbs straight up.